How To Fix DGA129 - A data record with this key already exist

SAP Error Message - Details

• Message type: E = Error

• Message class: DGA - DG: Messages for Dangerous Goods Management (A)

• Message number: 129

• Message text: A data record with this key already exist

What causes this issue?

You attempted to create a data record with a key that already exists.

System Response

The system cannot create the new data record.

How to fix this error?

In order to create a data record, all other data records with the same
logical key must be deleted beforehand.
If the data record that already exists has a deletion indicator, you
can remove the deletion indicator in order to reactivate the data
record.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DGA129 - A data record with this key already exist ?

  The SAP error message DGA129, which states "A data record with this key already exists," typically occurs when you are trying to create or insert a new record in a database table, but a record with the same key already exists. This can happen in various contexts, such as during data entry, data uploads, or when executing certain transactions.
  Cause:
  
  Duplicate Key: The most common cause is that the key you are trying to use for the new record already exists in the database. This could be a primary key or a unique key constraint violation.
  Data Upload Issues: If you are uploading data (e.g., through LSMW, BAPIs, or other data migration tools), the source data may contain duplicates.
  Incorrect Logic in Custom Programs: If you are using custom ABAP programs or enhancements, there may be logic that does not properly check for existing records before attempting to create a new one.
  Concurrent Transactions: If multiple users or processes are trying to create records simultaneously, one may succeed while the other fails due to the existing record.
  
  Solution:
  
  Check for Existing Records: Before creating a new record, check the database table to see if a record with the same key already exists. You can do this using transaction codes like SE11 (Data Dictionary) or SE16 (Data Browser).
  Modify the Key: If you need to create a new record, consider modifying the key to ensure it is unique.
  Data Cleansing: If you are uploading data, ensure that the source data is cleansed and does not contain duplicates.
  Error Handling in Custom Code: If the error arises from custom ABAP code, implement error handling to check for existing records before attempting to insert new ones.
  Transaction Management: If concurrent transactions are an issue, consider implementing locking mechanisms or using appropriate transaction management techniques to prevent conflicts.
  
  Related Information:
  
  Transaction Codes: Use SE11 to view the structure of the table and understand the key fields. Use SE16 to query the table for existing records.
  SAP Notes: Check SAP Notes for any known issues or patches related to the specific transaction or module you are working with.
  Debugging: If the error occurs in a custom program, use the ABAP debugger to trace the execution and identify where the duplicate key check is failing.
  Documentation: Review the documentation for the specific module or transaction you are working with to understand the expected behavior regarding key constraints.
  
  By following these steps, you should be able to identify the cause of the DGA129 error and implement a suitable solution.